arXiv · math/9910108
On the imbedding of a finite family of closed disks into a plane or S^{2}
Abstract
Let $\{V_{i}\}_{i=1}^{n}$ be a finite family of closed subsets of a plane or a sphere $S^{2}$, each homeomorphic to the two-dimensional disk. In this paper we discuss the question how the boundary of connected components of a complement $\rr^{2} \setminus \bigcup_{i=1}^{n} V_{i}$ (accordingly, $S^{2} \setminus \bigcup_{i=1}^{n} V_{i}$) is arranged. It appears, if a set $\bigcup_{i=1}^{n} \Int V_{i}$ is connected, that the boundary $\partial W$ of every connected component $W$ of the set $\rr^{2} \setminus \bigcup_{i=1}^{n} V_{i}$ (accordingly, $S^{2} \setminus \bigcup_{i=1}^{n} V_{i}$) is homeomorphic to a circle.
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Eugene Polulyakh. 1999-10-21. On the imbedding of a finite family of closed disks into a plane or S^{2}. https://arxiv.org/abs/math/9910108
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